/Engine/Source/Runtime/Engine/Classes/Engine/Texture.h
Returns aFMipDatastructure that wraps around the entire mip chain for read only operations. This is more efficient than calling the above method once per mip.
[FMipData](API\Runtime\Engine\Engine\FTextureSource\FMipData) GetMipData ( class [IImageWrapperModule](API\Runtime\ImageWrapper\IImageWrapperModule) * ImageWrapperModule )